Parting wax



Patented Dec. 28, 1937 UNITED STATES PATENT OFFICE No Drawing. Application December 17, 1936, Serial No. 116,381

1 Claim.

My inventionrelates to improvements in parting waxes, and. an object of my invention is to provide an inexpensive and effective compound especially useful and suitable for treating plates 5 or other bodies used in and during a molding operation, which compound consists of the ingredients respectively necessary for mixture in stages of different combinations of ingredients to produce the completed association of both in the coating evenly ofsurfaces of such bodies before the taking of a molded reproduction from the matrix body or pattern, and whereby a perfect reproduction of such pattern is obtained without the adhering of sand on the pattern, and whereby as a consequence the casting is perfectly and smoothly shaped.

I have accomplished the above object by means of formulas and different stages of mixing of ingredients at desired times, to effect the above uses in practice.

For approximately one gallon of the preparation, in the first stage of combination of ingredients, melt-one pound of rosin over a slow fire, and then remove and mix the melted rosin with two quarts of gasoline, placing this mixture in a tightly corked container.

In the second stage of combination of ingredients, melt one pint of parafiin wax, and mix with one pint of clear gasoline, and one pint of light cylinder oil (No; 20 preferred). Then add twothirds of a gallon of kerosene, and one half pint of the first mentioned solution of rosin in gasoline and add to the mixture one half fluid ounce of castor oil. Place this mixture in a cold pack for thirty minutes.

The completed mixture should be placed in a closable container for future use.

A small quantity of this preparation may be well rubbed on the pattern, using a clean cloth.

This preparation prevents the adherence to the 10 pattern of sand grains, whereby the casting is completed with a smooth surface.

The preparation will remain moist in use in molding operations, and of very slow evaporation, due to the retarding action of the castor oil 15 therein, as proved by constant practice.

I claim:

A method of preparing a parting wax, consisting in combining the following ingredients and mixing them together in successive stages, for approximately one gallon of the preparation, as follows:

First; mix one pound of melted rosin with two quarts of gasoline, and keep in a closed container,

Second; melt one pint of parafiin wax, and mix with one pint of gasoline, one pint of light cylinder oil, two-thirds of a gallon of kerosene, one-half fluid ounce of castor oil, then add to this mixture one half pint of the first preparation.

CHARLES V. GOODYEAR. 3o 

